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rtl-sdr/src/librtlsdr.c

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/*
* rtl-sdr, turns your Realtek RTL2832 based DVB dongle into a SDR receiver
* Copyright (C) 2012 by Steve Markgraf <steve@steve-m.de>
* Copyright (C) 2012 by Dimitri Stolnikov <horiz0n@gmx.net>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#ifndef _WIN32
#include <unistd.h>
#define min(a, b) (((a) < (b)) ? (a) : (b))
#endif
#include <libusb.h>
/*
* All libusb callback functions should be marked with the LIBUSB_CALL macro
* to ensure that they are compiled with the same calling convention as libusb.
*
* If the macro isn't available in older libusb versions, we simply define it.
*/
#ifndef LIBUSB_CALL
#define LIBUSB_CALL
#endif
#include "rtl-sdr.h"
#include "tuner_e4k.h"
#include "tuner_fc0012.h"
#include "tuner_fc0013.h"
#include "tuner_fc2580.h"
typedef struct rtlsdr_tuner_iface {
/* tuner interface */
int (*init)(void *);
int (*exit)(void *);
int (*set_freq)(void *, uint32_t freq /* Hz */);
int (*set_bw)(void *, int bw /* Hz */);
int (*set_gain)(void *, int gain /* tenth dB */);
int (*set_if_gain)(void *, int stage, int gain /* tenth dB */);
int (*set_gain_mode)(void *, int manual);
} rtlsdr_tuner_iface_t;
enum rtlsdr_async_status {
RTLSDR_INACTIVE = 0,
RTLSDR_CANCELING,
RTLSDR_RUNNING
};
struct rtlsdr_dev {
libusb_context *ctx;
struct libusb_device_handle *devh;
uint32_t xfer_buf_num;
uint32_t xfer_buf_len;
struct libusb_transfer **xfer;
unsigned char **xfer_buf;
rtlsdr_read_async_cb_t cb;
void *cb_ctx;
enum rtlsdr_async_status async_status;
/* rtl demod context */
uint32_t rate; /* Hz */
uint32_t rtl_xtal; /* Hz */
/* tuner context */
enum rtlsdr_tuner tuner_type;
rtlsdr_tuner_iface_t *tuner;
uint32_t tun_xtal; /* Hz */
uint32_t freq; /* Hz */
int corr; /* ppm */
int gain; /* tenth dB */
struct e4k_state e4k_s;
};
void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val);
/* generic tuner interface functions, shall be moved to the tuner implementations */
int e4000_init(void *dev) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
devt->e4k_s.i2c_addr = E4K_I2C_ADDR;
devt->e4k_s.vco.fosc = devt->tun_xtal; /* no need to correct it here */
devt->e4k_s.rtl_dev = dev;
return e4k_init(&devt->e4k_s);
}
int e4000_exit(void *dev) { return 0; }
int e4000_set_freq(void *dev, uint32_t freq) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return e4k_tune_freq(&devt->e4k_s, freq);
}
int e4000_set_bw(void *dev, int bw) {
return 0;
}
int e4000_set_gain(void *dev, int gain) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
int mixgain = (gain > 340) ? 12 : 4;
int enhgain = (gain - 420);
if(e4k_set_lna_gain(&devt->e4k_s, min(300, gain - 40)) == -EINVAL)
return -1;
if(e4k_mixer_gain_set(&devt->e4k_s, mixgain) == -EINVAL)
return -1;
if(enhgain >= 0)
if(e4k_set_enh_gain(&devt->e4k_s, enhgain) == -EINVAL)
return -1;
return 0;
}
int e4000_set_if_gain(void *dev, int stage, int gain) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return e4k_if_gain_set(&devt->e4k_s, (uint8_t)stage, (int8_t)(gain / 10));
}
int e4000_set_gain_mode(void *dev, int manual) {
rtlsdr_dev_t* devt = (rtlsdr_dev_t*)dev;
return e4k_enable_manual_gain(&devt->e4k_s, manual);
}
int _fc0012_init(void *dev) { return fc0012_init(dev); }
int fc0012_exit(void *dev) { return 0; }
int fc0012_set_freq(void *dev, uint32_t freq) {
/* select V-band/U-band filter */
rtlsdr_set_gpio_bit(dev, 6, (freq > 300000000) ? 1 : 0);
return fc0012_set_params(dev, freq, 6000000);
}
int fc0012_set_bw(void *dev, int bw) { return 0; }
int _fc0012_set_gain(void *dev, int gain) { return fc0012_set_gain(dev, gain); }
int fc0012_set_gain_mode(void *dev, int manual) { return 0; }
int _fc0013_init(void *dev) { return fc0013_init(dev); }
int fc0013_exit(void *dev) { return 0; }
int fc0013_set_freq(void *dev, uint32_t freq) {
/* select V-band/U-band filter */
rtlsdr_set_gpio_bit(dev, 6, (freq > 300000000) ? 1 : 0);
return fc0013_set_params(dev, freq, 6000000);
}
int fc0013_set_bw(void *dev, int bw) { return 0; }
int _fc0013_set_gain(void *dev, int gain) { return fc0013_set_gain(dev, gain); }
int fc0013_set_gain_mode(void *dev, int manual) { return 0; }
int fc2580_init(void *dev) { return fc2580_Initialize(dev); }
int fc2580_exit(void *dev) { return 0; }
int _fc2580_set_freq(void *dev, uint32_t freq) {
return fc2580_SetRfFreqHz(dev, freq);
}
int fc2580_set_bw(void *dev, int bw) { return fc2580_SetBandwidthMode(dev, 1); }
int fc2580_set_gain(void *dev, int gain) { return 0; }
int fc2580_set_gain_mode(void *dev, int manual) { return 0; }
/* definition order must match enum rtlsdr_tuner */
static rtlsdr_tuner_iface_t tuners[] = {
{
NULL, NULL, NULL, NULL, NULL, NULL, NULL /* dummy for unknown tuners */
},
{
e4000_init, e4000_exit,
e4000_set_freq, e4000_set_bw, e4000_set_gain, e4000_set_if_gain,
e4000_set_gain_mode
},
{
_fc0012_init, fc0012_exit,
fc0012_set_freq, fc0012_set_bw, _fc0012_set_gain, NULL,
fc0012_set_gain_mode
},
{
_fc0013_init, fc0013_exit,
fc0013_set_freq, fc0013_set_bw, _fc0013_set_gain, NULL,
fc0013_set_gain_mode
},
{
fc2580_init, fc2580_exit,
_fc2580_set_freq, fc2580_set_bw, fc2580_set_gain, NULL,
fc2580_set_gain_mode
},
};
typedef struct rtlsdr_dongle {
uint16_t vid;
uint16_t pid;
const char *name;
} rtlsdr_dongle_t;
/*
* Please add your device here and send a patch to osmocom-sdr@lists.osmocom.org
*/
static rtlsdr_dongle_t known_devices[] = {
{ 0x0bda, 0x2832, "Generic RTL2832U (e.g. hama nano)" },
{ 0x0bda, 0x2838, "ezcap USB 2.0 DVB-T/DAB/FM dongle" },
{ 0x0ccd, 0x00a9, "Terratec Cinergy T Stick Black (rev 1)" },
{ 0x0ccd, 0x00b3, "Terratec NOXON DAB/DAB+ USB dongle (rev 1)" },
{ 0x0ccd, 0x00b4, "Terratec NOXON DAB/DAB+ USB dongle (rev 1)" },
{ 0x0ccd, 0x00b7, "Terratec NOXON DAB/DAB+ USB dongle (rev 1)" },
{ 0x0ccd, 0x00c6, "Terratec NOXON DAB/DAB+ USB dongle (rev 1)" },
{ 0x0ccd, 0x00d3, "Terratec Cinergy T Stick RC (Rev.3)" },
{ 0x0ccd, 0x00d7, "Terratec T Stick PLUS" },
{ 0x0ccd, 0x00e0, "Terratec NOXON DAB/DAB+ USB dongle (rev 2)" },
{ 0x185b, 0x0620, "Compro Videomate U620F"},
{ 0x185b, 0x0650, "Compro Videomate U650F"},
{ 0x185b, 0x0680, "Compro Videomate U680F"},
{ 0x1f4d, 0xb803, "GTek T803" },
{ 0x1f4d, 0xc803, "Lifeview LV5TDeluxe" },
{ 0x1f4d, 0xd286, "MyGica TD312" },
{ 0x1f4d, 0xd803, "PROlectrix DV107669" },
{ 0x1b80, 0xd398, "Zaapa ZT-MINDVBZP" },
{ 0x1b80, 0xd3a4, "Twintech UT-40" },
{ 0x1d19, 0x1101, "Dexatek DK DVB-T Dongle (Logilink VG0002A)" },
{ 0x1d19, 0x1102, "Dexatek DK DVB-T Dongle (MSI DigiVox mini II V3.0)" },
{ 0x1d19, 0x1103, "Dexatek Technology Ltd. DK 5217 DVB-T Dongle" },
{ 0x0458, 0x707f, "Genius TVGo DVB-T03 USB dongle (Ver. B)" },
{ 0x1b80, 0xd393, "GIGABYTE GT-U7300" },
{ 0x1b80, 0xd394, "DIKOM USB-DVBT HD" },
{ 0x1b80, 0xd395, "Peak 102569AGPK" },
{ 0x1b80, 0xd39d, "SVEON STV20 DVB-T USB & FM" },
};
#define DEFAULT_BUF_NUMBER 32
#define DEFAULT_BUF_LENGTH (16 * 32 * 512)
#define DEF_RTL_XTAL_FREQ 28800000
#define MIN_RTL_XTAL_FREQ (DEF_RTL_XTAL_FREQ - 1000)
#define MAX_RTL_XTAL_FREQ (DEF_RTL_XTAL_FREQ + 1000)
#define MAX_SAMP_RATE 3200000
#define CTRL_IN (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_IN)
#define CTRL_OUT (LIBUSB_REQUEST_TYPE_VENDOR | LIBUSB_ENDPOINT_OUT)
#define CTRL_TIMEOUT 300
#define BULK_TIMEOUT 0
enum usb_reg {
USB_SYSCTL = 0x2000,
USB_CTRL = 0x2010,
USB_STAT = 0x2014,
USB_EPA_CFG = 0x2144,
USB_EPA_CTL = 0x2148,
USB_EPA_MAXPKT = 0x2158,
USB_EPA_MAXPKT_2 = 0x215a,
USB_EPA_FIFO_CFG = 0x2160,
};
enum sys_reg {
DEMOD_CTL = 0x3000,
GPO = 0x3001,
GPI = 0x3002,
GPOE = 0x3003,
GPD = 0x3004,
SYSINTE = 0x3005,
SYSINTS = 0x3006,
GP_CFG0 = 0x3007,
GP_CFG1 = 0x3008,
SYSINTE_1 = 0x3009,
SYSINTS_1 = 0x300a,
DEMOD_CTL_1 = 0x300b,
IR_SUSPEND = 0x300c,
};
enum blocks {
DEMODB = 0,
USBB = 1,
SYSB = 2,
TUNB = 3,
ROMB = 4,
IRB = 5,
IICB = 6,
};
int rtlsdr_read_array(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
{
int r;
uint16_t index = (block << 8);
r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, array, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
return r;
}
int rtlsdr_write_array(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t *array, uint8_t len)
{
int r;
uint16_t index = (block << 8) | 0x10;
r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, array, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
return r;
}
int rtlsdr_i2c_write_reg(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t reg, uint8_t val)
{
uint16_t addr = i2c_addr;
uint8_t data[2];
data[0] = reg;
data[1] = val;
return rtlsdr_write_array(dev, IICB, addr, (uint8_t *)&data, 2);
}
uint8_t rtlsdr_i2c_read_reg(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t reg)
{
uint16_t addr = i2c_addr;
uint8_t data;
rtlsdr_write_array(dev, IICB, addr, &reg, 1);
rtlsdr_read_array(dev, IICB, addr, &data, 1);
return data;
}
/* TODO clean this up again */
int e4k_reg_write(struct e4k_state *e4k, uint8_t reg, uint8_t val)
{
return rtlsdr_i2c_write_reg((rtlsdr_dev_t*)e4k->rtl_dev, e4k->i2c_addr, reg, val);}
uint8_t e4k_reg_read(struct e4k_state *e4k, uint8_t reg)
{
return rtlsdr_i2c_read_reg((rtlsdr_dev_t*)e4k->rtl_dev, e4k->i2c_addr, reg);
}
int rtlsdr_i2c_write(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
{
uint16_t addr = i2c_addr;
if (!dev)
return -1;
return rtlsdr_write_array(dev, IICB, addr, buffer, len);
}
int rtlsdr_i2c_read(rtlsdr_dev_t *dev, uint8_t i2c_addr, uint8_t *buffer, int len)
{
uint16_t addr = i2c_addr;
if (!dev)
return -1;
return rtlsdr_read_array(dev, IICB, addr, buffer, len);
}
uint16_t rtlsdr_read_reg(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint8_t len)
{
int r;
unsigned char data[2];
uint16_t index = (block << 8);
uint16_t reg;
r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, data, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
reg = (data[1] << 8) | data[0];
return reg;
}
int rtlsdr_write_reg(rtlsdr_dev_t *dev, uint8_t block, uint16_t addr, uint16_t val, uint8_t len)
{
int r;
unsigned char data[2];
uint16_t index = (block << 8) | 0x10;
if (len == 1)
data[0] = val & 0xff;
else
data[0] = val >> 8;
data[1] = val & 0xff;
r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, data, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
return r;
}
uint16_t rtlsdr_demod_read_reg(rtlsdr_dev_t *dev, uint8_t page, uint16_t addr, uint8_t len)
{
int r;
unsigned char data[2];
uint16_t index = page;
uint16_t reg;
addr = (addr << 8) | 0x20;
r = libusb_control_transfer(dev->devh, CTRL_IN, 0, addr, index, data, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
reg = (data[1] << 8) | data[0];
return reg;
}
int rtlsdr_demod_write_reg(rtlsdr_dev_t *dev, uint8_t page, uint16_t addr, uint16_t val, uint8_t len)
{
int r;
unsigned char data[2];
uint16_t index = 0x10 | page;
addr = (addr << 8) | 0x20;
if (len == 1)
data[0] = val & 0xff;
else
data[0] = val >> 8;
data[1] = val & 0xff;
r = libusb_control_transfer(dev->devh, CTRL_OUT, 0, addr, index, data, len, CTRL_TIMEOUT);
if (r < 0)
fprintf(stderr, "%s failed with %d\n", __FUNCTION__, r);
rtlsdr_demod_read_reg(dev, 0x0a, 0x01, 1);
return r;
}
void rtlsdr_set_gpio_bit(rtlsdr_dev_t *dev, uint8_t gpio, int val)
{
uint8_t r;
gpio = 1 << gpio;
r = rtlsdr_read_reg(dev, SYSB, GPO, 1);
r = val ? (r | gpio) : (r & ~gpio);
rtlsdr_write_reg(dev, SYSB, GPO, r, 1);
}
void rtlsdr_set_gpio_output(rtlsdr_dev_t *dev, uint8_t gpio)
{
int r;
gpio = 1 << gpio;
r = rtlsdr_read_reg(dev, SYSB, GPD, 1);
rtlsdr_write_reg(dev, SYSB, GPO, r & ~gpio, 1);
r = rtlsdr_read_reg(dev, SYSB, GPOE, 1);
rtlsdr_write_reg(dev, SYSB, GPOE, r | gpio, 1);
}
void rtlsdr_set_i2c_repeater(rtlsdr_dev_t *dev, int on)
{
rtlsdr_demod_write_reg(dev, 1, 0x01, on ? 0x18 : 0x10, 1);
}
void rtlsdr_init_baseband(rtlsdr_dev_t *dev)
{
unsigned int i;
/* default FIR coefficients used for DAB/FM by the Windows driver,
* the DVB driver uses different ones */
uint8_t fir_coeff[] = {
0xca, 0xdc, 0xd7, 0xd8, 0xe0, 0xf2, 0x0e, 0x35, 0x06, 0x50,
0x9c, 0x0d, 0x71, 0x11, 0x14, 0x71, 0x74, 0x19, 0x41, 0xa5,
};
/* initialize USB */
rtlsdr_write_reg(dev, USBB, USB_SYSCTL, 0x09, 1);
rtlsdr_write_reg(dev, USBB, USB_EPA_MAXPKT, 0x0002, 2);
rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x1002, 2);
/* poweron demod */
rtlsdr_write_reg(dev, SYSB, DEMOD_CTL_1, 0x22, 1);
rtlsdr_write_reg(dev, SYSB, DEMOD_CTL, 0xe8, 1);
/* reset demod (bit 3, soft_rst) */
rtlsdr_demod_write_reg(dev, 1, 0x01, 0x14, 1);
rtlsdr_demod_write_reg(dev, 1, 0x01, 0x10, 1);
/* disable spectrum inversion and adjacent channel rejection */
rtlsdr_demod_write_reg(dev, 1, 0x15, 0x00, 1);
rtlsdr_demod_write_reg(dev, 1, 0x16, 0x0000, 2);
/* clear both DDC shift and IF frequency registers */
for (i = 0; i < 6; i++)
rtlsdr_demod_write_reg(dev, 1, 0x16 + i, 0x00, 1);
/* set FIR coefficients */
for (i = 0; i < sizeof (fir_coeff); i++)
rtlsdr_demod_write_reg(dev, 1, 0x1c + i, fir_coeff[i], 1);
/* enable SDR mode, disable DAGC (bit 5) */
rtlsdr_demod_write_reg(dev, 0, 0x19, 0x05, 1);
/* init FSM state-holding register */
rtlsdr_demod_write_reg(dev, 1, 0x93, 0xf0, 1);
/* disable AGC (en_dagc, bit 0) (this seems to have no effect) */
rtlsdr_demod_write_reg(dev, 1, 0x11, 0x00, 1);
/* disable PID filter (enable_PID = 0) */
rtlsdr_demod_write_reg(dev, 0, 0x61, 0x60, 1);
/* opt_adc_iq = 0, default ADC_I/ADC_Q datapath */
rtlsdr_demod_write_reg(dev, 0, 0x06, 0x80, 1);
/* Enable Zero-IF mode (en_bbin bit), DC cancellation (en_dc_est),
* IQ estimation/compensation (en_iq_comp, en_iq_est) */
rtlsdr_demod_write_reg(dev, 1, 0xb1, 0x1b, 1);
/* disable 4.096 MHz clock output on pin TP_CK0 */
rtlsdr_demod_write_reg(dev, 0, 0x0d, 0x83, 1);
}
int rtlsdr_deinit_baseband(rtlsdr_dev_t *dev)
{
int r = 0;
if (!dev)
return -1;
if (dev->tuner && dev->tuner->exit) {
rtlsdr_set_i2c_repeater(dev, 1);
r = dev->tuner->exit(dev); /* deinitialize tuner */
rtlsdr_set_i2c_repeater(dev, 0);
}
/* poweroff demodulator and ADCs */
rtlsdr_write_reg(dev, SYSB, DEMOD_CTL, 0x20, 1);
return r;
}
int rtlsdr_set_xtal_freq(rtlsdr_dev_t *dev, uint32_t rtl_freq, uint32_t tuner_freq)
{
int r = 0;
if (!dev)
return -1;
if (rtl_freq > 0 &&
(rtl_freq < MIN_RTL_XTAL_FREQ || rtl_freq > MAX_RTL_XTAL_FREQ))
return -2;
if (rtl_freq > 0 && dev->rtl_xtal != rtl_freq) {
dev->rtl_xtal = rtl_freq;
/* update xtal-dependent settings */
if (dev->rate)
r = rtlsdr_set_sample_rate(dev, dev->rate);
}
if (dev->tun_xtal != tuner_freq) {
if (0 == tuner_freq)
dev->tun_xtal = dev->rtl_xtal;
else
dev->tun_xtal = tuner_freq;
/* read corrected clock value into e4k structure */
if (rtlsdr_get_xtal_freq(dev, NULL, &dev->e4k_s.vco.fosc))
return -3;
/* update xtal-dependent settings */
if (dev->freq)
r = rtlsdr_set_center_freq(dev, dev->freq);
}
return r;
}
int rtlsdr_get_xtal_freq(rtlsdr_dev_t *dev, uint32_t *rtl_freq, uint32_t *tuner_freq)
{
if (!dev)
return -1;
#define APPLY_PPM_CORR(val,ppm) (((val) * (1.0 + (ppm) / 1e6)))
if (rtl_freq)
*rtl_freq = (uint32_t) APPLY_PPM_CORR(dev->rtl_xtal, dev->corr);
if (tuner_freq)
*tuner_freq = (uint32_t) APPLY_PPM_CORR(dev->tun_xtal, dev->corr);
return 0;
}
int rtlsdr_get_usb_strings(rtlsdr_dev_t *dev, char *manufact, char *product,
char *serial)
{
struct libusb_device_descriptor dd;
libusb_device *device = NULL;
const int buf_max = 256;
int r = 0;
if (!dev || !dev->devh)
return -1;
device = libusb_get_device(dev->devh);
r = libusb_get_device_descriptor(device, &dd);
if (r < 0)
return -1;
if (manufact) {
memset(manufact, 0, buf_max);
libusb_get_string_descriptor_ascii(dev->devh, dd.iManufacturer,
(unsigned char *)manufact,
buf_max);
}
if (product) {
memset(product, 0, buf_max);
libusb_get_string_descriptor_ascii(dev->devh, dd.iProduct,
(unsigned char *)product,
buf_max);
}
if (serial) {
memset(serial, 0, buf_max);
libusb_get_string_descriptor_ascii(dev->devh, dd.iSerialNumber,
(unsigned char *)serial,
buf_max);
}
return 0;
}
int rtlsdr_set_center_freq(rtlsdr_dev_t *dev, uint32_t freq)
{
int r = -1;
if (!dev || !dev->tuner)
return -1;
if (dev->tuner->set_freq) {
rtlsdr_set_i2c_repeater(dev, 1);
r = dev->tuner->set_freq(dev, freq);
rtlsdr_set_i2c_repeater(dev, 0);
if (!r)
dev->freq = freq;
else
dev->freq = 0;
}
return r;
}
uint32_t rtlsdr_get_center_freq(rtlsdr_dev_t *dev)
{
if (!dev)
return 0;
return dev->freq;
}
int rtlsdr_set_freq_correction(rtlsdr_dev_t *dev, int ppm)
{
int r = 0;
if (!dev)
return -1;
if (dev->corr == ppm)
return -2;
dev->corr = ppm;
/* read corrected clock value into e4k structure */
if (rtlsdr_get_xtal_freq(dev, NULL, &dev->e4k_s.vco.fosc))
return -3;
#if 0
if (dev->rate) /* reset sample rate to apply new correction value */
r |= rtlsdr_set_sample_rate(dev, dev->rate);
#endif
if (dev->freq) /* retune to apply new correction value */
r |= rtlsdr_set_center_freq(dev, dev->freq);
return r;
}
int rtlsdr_get_freq_correction(rtlsdr_dev_t *dev)
{
if (!dev)
return 0;
return dev->corr;
}
enum rtlsdr_tuner rtlsdr_get_tuner_type(rtlsdr_dev_t *dev)
{
if (!dev)
return -1;
return dev->tuner_type;
}
int rtlsdr_get_tuner_gains(rtlsdr_dev_t *dev, int *gains)
{
const int e4k_gains[] = { -10, 15, 40, 65, 90, 115, 140, 165, 190, 215,
240, 290, 340, 420, 430, 450, 470, 490 };
const int fc0012_gains[] = { -99, -40, 71, 179, 192 };
const int fc0013_gains[] = { -63, 71, 191, 197 };
const int fc2580_gains[] = { 0 /* no gain values */ };
int *ptr = NULL;
int len = 0;
if (!dev)
return -1;
switch (dev->tuner_type) {
case RTLSDR_TUNER_E4000:
ptr = (int *)e4k_gains; len = sizeof(e4k_gains);
break;
case RTLSDR_TUNER_FC0012:
ptr = (int *)fc0012_gains; len = sizeof(fc0012_gains);
break;
case RTLSDR_TUNER_FC0013:
ptr = (int *)fc0013_gains; len = sizeof(fc0013_gains);
break;
case RTLSDR_TUNER_FC2580:
ptr = (int *)fc2580_gains; len = sizeof(fc2580_gains);
break;
default:
fprintf(stderr, "Invalid tuner type %d\n", dev->tuner_type);
break;
}
if (!gains) { /* no buffer provided, just return the count */
return len / sizeof(int);
} else {
if (len)
memcpy(gains, ptr, len);
return len / sizeof(int);
}
}
int rtlsdr_set_tuner_gain(rtlsdr_dev_t *dev, int gain)
{
int r = 0;
if (!dev || !dev->tuner)
return -1;
if (dev->tuner->set_gain) {
rtlsdr_set_i2c_repeater(dev, 1);
r = dev->tuner->set_gain((void *)dev, gain);
rtlsdr_set_i2c_repeater(dev, 0);
}
if (!r)
dev->gain = gain;
else
dev->gain = 0;
return r;
}
int rtlsdr_get_tuner_gain(rtlsdr_dev_t *dev)
{
if (!dev)
return 0;
return dev->gain;
}
int rtlsdr_set_tuner_if_gain(rtlsdr_dev_t *dev, int stage, int gain)
{
int r = 0;
if (!dev || !dev->tuner)
return -1;
if (dev->tuner->set_if_gain) {
rtlsdr_set_i2c_repeater(dev, 1);
r = dev->tuner->set_if_gain(dev, stage, gain);
rtlsdr_set_i2c_repeater(dev, 0);
}
return r;
}
int rtlsdr_set_tuner_gain_mode(rtlsdr_dev_t *dev, int mode)
{
int r = 0;
if (!dev || !dev->tuner)
return -1;
if (dev->tuner->set_gain_mode) {
rtlsdr_set_i2c_repeater(dev, 1);
r = dev->tuner->set_gain_mode((void *)dev, mode);
rtlsdr_set_i2c_repeater(dev, 0);
}
return r;
}
/* two raised to the power of n */
#define TWO_POW(n) ((double)(1ULL<<(n)))
int rtlsdr_set_sample_rate(rtlsdr_dev_t *dev, uint32_t samp_rate)
{
uint16_t tmp;
uint32_t rsamp_ratio;
double real_rate;
uint32_t rtl_freq = dev->rtl_xtal;
if (!dev)
return -1;
/* check for the maximum rate the resampler supports */
if (samp_rate > MAX_SAMP_RATE)
samp_rate = MAX_SAMP_RATE;
#if 0
/* read corrected clock value */
if (rtlsdr_get_xtal_freq(dev, &rtl_freq, NULL))
return -2;
if (samp_rate == MAX_SAMP_RATE && rtl_freq != DEF_RTL_XTAL_FREQ)
rtl_freq = DEF_RTL_XTAL_FREQ;
#endif
rsamp_ratio = (rtl_freq * TWO_POW(22)) / samp_rate;
rsamp_ratio &= ~3;
real_rate = (rtl_freq * TWO_POW(22)) / rsamp_ratio;
if ( ((double)samp_rate) != real_rate )
fprintf(stderr, "Exact sample rate is: %f Hz\n", real_rate);
if (dev->tuner && dev->tuner->set_bw) {
rtlsdr_set_i2c_repeater(dev, 1);
dev->tuner->set_bw(dev, (int)real_rate);
rtlsdr_set_i2c_repeater(dev, 0);
}
dev->rate = (uint32_t)real_rate;
tmp = (rsamp_ratio >> 16);
rtlsdr_demod_write_reg(dev, 1, 0x9f, tmp, 2);
tmp = rsamp_ratio & 0xffff;
rtlsdr_demod_write_reg(dev, 1, 0xa1, tmp, 2);
/* reset demod (bit 3, soft_rst) */
rtlsdr_demod_write_reg(dev, 1, 0x01, 0x14, 1);
rtlsdr_demod_write_reg(dev, 1, 0x01, 0x10, 1);
return 0;
}
uint32_t rtlsdr_get_sample_rate(rtlsdr_dev_t *dev)
{
if (!dev)
return 0;
return dev->rate;
}
int rtlsdr_set_testmode(rtlsdr_dev_t *dev, int on)
{
if (!dev)
return -1;
return rtlsdr_demod_write_reg(dev, 0, 0x19, on ? 0x03 : 0x05, 1);
}
int rtlsdr_set_agc_mode(rtlsdr_dev_t *dev, int on)
{
if (!dev)
return -1;
return rtlsdr_demod_write_reg(dev, 0, 0x19, on ? 0x25 : 0x05, 1);
}
static rtlsdr_dongle_t *find_known_device(uint16_t vid, uint16_t pid)
{
unsigned int i;
rtlsdr_dongle_t *device = NULL;
for (i = 0; i < sizeof(known_devices)/sizeof(rtlsdr_dongle_t); i++ ) {
if (known_devices[i].vid == vid && known_devices[i].pid == pid) {
device = &known_devices[i];
break;
}
}
return device;
}
uint32_t rtlsdr_get_device_count(void)
{
int i;
libusb_context *ctx;
libusb_device **list;
uint32_t device_count = 0;
struct libusb_device_descriptor dd;
ssize_t cnt;
libusb_init(&ctx);
cnt = libusb_get_device_list(ctx, &list);
for (i = 0; i < cnt; i++) {
libusb_get_device_descriptor(list[i], &dd);
if (find_known_device(dd.idVendor, dd.idProduct))
device_count++;
}
libusb_free_device_list(list, 1);
libusb_exit(ctx);
return device_count;
}
const char *rtlsdr_get_device_name(uint32_t index)
{
int i;
libusb_context *ctx;
libusb_device **list;
struct libusb_device_descriptor dd;
rtlsdr_dongle_t *device = NULL;
uint32_t device_count = 0;
ssize_t cnt;
libusb_init(&ctx);
cnt = libusb_get_device_list(ctx, &list);
for (i = 0; i < cnt; i++) {
libusb_get_device_descriptor(list[i], &dd);
device = find_known_device(dd.idVendor, dd.idProduct);
if (device) {
device_count++;
if (index == device_count - 1)
break;
}
}
libusb_free_device_list(list, 1);
libusb_exit(ctx);
if (device)
return device->name;
else
return "";
}
int rtlsdr_get_device_usb_strings(uint32_t index, char *manufact,
char *product, char *serial)
{
int r = -2;
int i;
libusb_context *ctx;
libusb_device **list;
struct libusb_device_descriptor dd;
rtlsdr_dongle_t *device = NULL;
rtlsdr_dev_t devt;
uint32_t device_count = 0;
ssize_t cnt;
libusb_init(&ctx);
cnt = libusb_get_device_list(ctx, &list);
for (i = 0; i < cnt; i++) {
libusb_get_device_descriptor(list[i], &dd);
device = find_known_device(dd.idVendor, dd.idProduct);
if (device) {
device_count++;
if (index == device_count - 1) {
r = libusb_open(list[i], &devt.devh);
if (!r) {
r = rtlsdr_get_usb_strings(&devt,
manufact,
product,
serial);
libusb_close(devt.devh);
}
break;
}
}
}
libusb_free_device_list(list, 1);
libusb_exit(ctx);
return r;
}
int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index)
{
int r;
int i;
libusb_device **list;
rtlsdr_dev_t *dev = NULL;
libusb_device *device = NULL;
uint32_t device_count = 0;
struct libusb_device_descriptor dd;
uint8_t reg;
ssize_t cnt;
dev = malloc(sizeof(rtlsdr_dev_t));
if (NULL == dev)
return -ENOMEM;
memset(dev, 0, sizeof(rtlsdr_dev_t));
libusb_init(&dev->ctx);
cnt = libusb_get_device_list(dev->ctx, &list);
for (i = 0; i < cnt; i++) {
device = list[i];
libusb_get_device_descriptor(list[i], &dd);
if (find_known_device(dd.idVendor, dd.idProduct)) {
device_count++;
}
if (index == device_count - 1)
break;
device = NULL;
}
if (!device) {
r = -1;
goto err;
}
r = libusb_open(device, &dev->devh);
if (r < 0) {
libusb_free_device_list(list, 1);
fprintf(stderr, "usb_open error %d\n", r);
goto err;
}
libusb_free_device_list(list, 1);
r = libusb_claim_interface(dev->devh, 0);
if (r < 0) {
fprintf(stderr, "usb_claim_interface error %d\n", r);
goto err;
}
dev->rtl_xtal = DEF_RTL_XTAL_FREQ;
rtlsdr_init_baseband(dev);
/* Probe tuners */
rtlsdr_set_i2c_repeater(dev, 1);
reg = rtlsdr_i2c_read_reg(dev, E4K_I2C_ADDR, E4K_CHECK_ADDR);
if (reg == E4K_CHECK_VAL) {
fprintf(stderr, "Found Elonics E4000 tuner\n");
dev->tuner_type = RTLSDR_TUNER_E4000;
goto found;
}
reg = rtlsdr_i2c_read_reg(dev, FC0013_I2C_ADDR, FC0013_CHECK_ADDR);
if (reg == FC0013_CHECK_VAL) {
fprintf(stderr, "Found Fitipower FC0013 tuner\n");
rtlsdr_set_gpio_output(dev, 6);
dev->tuner_type = RTLSDR_TUNER_FC0013;
goto found;
}
/* initialise GPIOs */
rtlsdr_set_gpio_output(dev, 5);
/* reset tuner before probing */
rtlsdr_set_gpio_bit(dev, 5, 1);
rtlsdr_set_gpio_bit(dev, 5, 0);
reg = rtlsdr_i2c_read_reg(dev, FC2580_I2C_ADDR, FC2580_CHECK_ADDR);
if ((reg & 0x7f) == FC2580_CHECK_VAL) {
fprintf(stderr, "Found FCI 2580 tuner\n");
dev->tuner_type = RTLSDR_TUNER_FC2580;
goto found;
}
reg = rtlsdr_i2c_read_reg(dev, FC0012_I2C_ADDR, FC0012_CHECK_ADDR);
if (reg == FC0012_CHECK_VAL) {
fprintf(stderr, "Found Fitipower FC0012 tuner\n");
rtlsdr_set_gpio_output(dev, 6);
dev->tuner_type = RTLSDR_TUNER_FC0012;
goto found;
}
found:
if (dev->tuner_type == RTLSDR_TUNER_UNKNOWN) {
r = -1;
goto err;
}
dev->tuner = &tuners[dev->tuner_type];
dev->tun_xtal = dev->rtl_xtal; /* use the rtl clock value by default */
if (dev->tuner->init)
r = dev->tuner->init(dev);
rtlsdr_set_i2c_repeater(dev, 0);
*out_dev = dev;
return 0;
err:
if (dev) {
if (dev->ctx)
libusb_exit(dev->ctx);
free(dev);
}
return r;
}
int rtlsdr_close(rtlsdr_dev_t *dev)
{
if (!dev)
return -1;
rtlsdr_deinit_baseband(dev);
libusb_release_interface(dev->devh, 0);
libusb_close(dev->devh);
libusb_exit(dev->ctx);
free(dev);
return 0;
}
int rtlsdr_reset_buffer(rtlsdr_dev_t *dev)
{
if (!dev)
return -1;
rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x1002, 2);
rtlsdr_write_reg(dev, USBB, USB_EPA_CTL, 0x0000, 2);
return 0;
}
int rtlsdr_read_sync(rtlsdr_dev_t *dev, void *buf, int len, int *n_read)
{
if (!dev)
return -1;
return libusb_bulk_transfer(dev->devh, 0x81, buf, len, n_read, BULK_TIMEOUT);
}
static void LIBUSB_CALL _libusb_callback(struct libusb_transfer *xfer)
{
rtlsdr_dev_t *dev = (rtlsdr_dev_t *)xfer->user_data;
if (LIBUSB_TRANSFER_COMPLETED == xfer->status) {
if (dev->cb)
dev->cb(xfer->buffer, xfer->actual_length, dev->cb_ctx);
libusb_submit_transfer(xfer); /* resubmit transfer */
} else {
/*fprintf(stderr, "transfer status: %d\n", xfer->status);*/
rtlsdr_cancel_async(dev); /* abort async loop */
}
}
int rtlsdr_wait_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, void *ctx)
{
return rtlsdr_read_async(dev, cb, ctx, 0, 0);
}
static int _rtlsdr_alloc_async_buffers(rtlsdr_dev_t *dev)
{
unsigned int i;
if (!dev)
return -1;
if (!dev->xfer) {
dev->xfer = malloc(dev->xfer_buf_num *
sizeof(struct libusb_transfer *));
for(i = 0; i < dev->xfer_buf_num; ++i)
dev->xfer[i] = libusb_alloc_transfer(0);
}
if (!dev->xfer_buf) {
dev->xfer_buf = malloc(dev->xfer_buf_num *
sizeof(unsigned char *));
for(i = 0; i < dev->xfer_buf_num; ++i)
dev->xfer_buf[i] = malloc(dev->xfer_buf_len);
}
return 0;
}
static int _rtlsdr_free_async_buffers(rtlsdr_dev_t *dev)
{
unsigned int i;
if (!dev)
return -1;
if (dev->xfer) {
for(i = 0; i < dev->xfer_buf_num; ++i) {
if (dev->xfer[i]) {
libusb_free_transfer(dev->xfer[i]);
}
}
free(dev->xfer);
dev->xfer = NULL;
}
if (dev->xfer_buf) {
for(i = 0; i < dev->xfer_buf_num; ++i) {
if (dev->xfer_buf[i])
free(dev->xfer_buf[i]);
}
free(dev->xfer_buf);
dev->xfer_buf = NULL;
}
return 0;
}
int rtlsdr_read_async(rtlsdr_dev_t *dev, rtlsdr_read_async_cb_t cb, void *ctx,
uint32_t buf_num, uint32_t buf_len)
{
unsigned int i;
int r;
struct timeval tv = { 1, 0 };
if (!dev)
return -1;
dev->cb = cb;
dev->cb_ctx = ctx;
if (buf_num > 0)
dev->xfer_buf_num = buf_num;
else
dev->xfer_buf_num = DEFAULT_BUF_NUMBER;
if (buf_len > 0 && buf_len % 512 == 0) /* len must be multiple of 512 */
dev->xfer_buf_len = buf_len;
else
dev->xfer_buf_len = DEFAULT_BUF_LENGTH;
_rtlsdr_alloc_async_buffers(dev);
for(i = 0; i < dev->xfer_buf_num; ++i) {
libusb_fill_bulk_transfer(dev->xfer[i],
dev->devh,
0x81,
dev->xfer_buf[i],
dev->xfer_buf_len,
_libusb_callback,
(void *)dev,
BULK_TIMEOUT);
libusb_submit_transfer(dev->xfer[i]);
}
dev->async_status = RTLSDR_RUNNING;
while (RTLSDR_INACTIVE != dev->async_status) {
r = libusb_handle_events_timeout(dev->ctx, &tv);
if (r < 0) {
/*fprintf(stderr, "handle_events returned: %d\n", r);*/
if (r == LIBUSB_ERROR_INTERRUPTED) /* stray signal */
continue;
break;
}
if (RTLSDR_CANCELING == dev->async_status) {
dev->async_status = RTLSDR_INACTIVE;
if (!dev->xfer)
break;
for(i = 0; i < dev->xfer_buf_num; ++i) {
if (!dev->xfer[i])
continue;
if (dev->xfer[i]->status == LIBUSB_TRANSFER_COMPLETED) {
libusb_cancel_transfer(dev->xfer[i]);
dev->async_status = RTLSDR_CANCELING;
}
}
if (RTLSDR_INACTIVE == dev->async_status)
break;
}
}
_rtlsdr_free_async_buffers(dev);
return r;
}
int rtlsdr_cancel_async(rtlsdr_dev_t *dev)
{
if (!dev)
return -1;
if (RTLSDR_RUNNING == dev->async_status) {
dev->async_status = RTLSDR_CANCELING;
return 0;
}
return -2;
}
uint32_t rtlsdr_get_tuner_clock(void *dev)
{
uint32_t tuner_freq;
if (!dev)
return 0;
/* read corrected clock value */
if (rtlsdr_get_xtal_freq((rtlsdr_dev_t *)dev, NULL, &tuner_freq))
return 0;
return tuner_freq;
}
int rtlsdr_i2c_write_fn(void *dev, uint8_t addr, uint8_t *buf, int len)
{
if (dev)
return rtlsdr_i2c_write(((rtlsdr_dev_t *)dev), addr, buf, len);
return -1;
}
int rtlsdr_i2c_read_fn(void *dev, uint8_t addr, uint8_t *buf, int len)
{
if (dev)
return rtlsdr_i2c_read(((rtlsdr_dev_t *)dev), addr, buf, len);
return -1;
}
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